A 100-year-old pedophile has been released from prison in the U.S. despite fears he is still an "active threat" to children, Sky News reported.

Theodore Sypnier was freed from jail in upstate New York and is being moved from a half-way house to a flat in Buffalo.

Residents say the sex offender should spend the rest of his life behind bars, and fear he will prey on youngsters in the area.

"I want him away from society as long as possible," Erie County district attorney Frank Sedita told wgrz.com.

"It doesn't matter to me that he's 100-years-old. He's evil. He's a pedophile. Pedophiles are the worst."

Sypnier was charged in 1999 with raping two young sisters, who were aged four and seven at the time.

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